Java中的错误划分

Question

我正在将两个int值相除，并且我希望得到一个双精度的值。但是它的工作原理很奇怪，在除法之前它具有正确的值，但是没有给出正确的答案。

    public void Analyse() {
        for (FlowPacket fp : this.flow.GetAll()) {
            if (fp.direction==1){
               this.sentPackets++;
               this.sentLength = this.sentLength + fp.packetLength;
            }
            else{
                this.receivedPackets++;
                this.receivedLength = this.receivedLength + fp.packetLength;
            }

        }
        if(this.receivedPackets==0)
                this.receivedPackets = 1;
    }


public double CalcRatio() {
            return (this.sentPackets/this.receivedPackets);
        }

- - - - - - - - - - - - - - 主要 - - - - - - - - - - - -----------

System.out.print("Sent packets: " + analyser.getTotalSentPackets() + " , ");
System.out.print("Received packets: " + analyser.getTotalReceivedPackets() + " , ");
System.out.print("ratio: " + analyser.CalcRatio() + " , ");

---------------------------- outout --------------------- ---------

 Sent packets: 2694 , Received packets: 5753 , ratio: 0

Answer 1

(double)this.sentPackets/this.receivedPackets

…应该解决它。